Had I not just bought a new inner tube filled with slime at Wally World
for about $9 (guaranteed for two years! (we'll see about that)), I'd buy
the solid tire at Tractor Supply. For a few extra dollars I wouldn't
mess with the tedium and/or mess associated with filling a tire with
junk. Unless, maybe, I can find a gallon or so of mercury. That would
make a fine outrigger wheel!

On 10/28/2015 9:24 PM, wrote:
http://www.nacomposites.com/pages/products.asp

Look under Core Materials and Polyurethane Foams.

--
Dan, 5J